Color

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Before you start ...

1. It’s usually bad style to use explicit color switches in the text. It’s better to define a semantic command that takes care of the color switching. For example, instead of using \color[red]{important text}, define 

\definehighlight[important][color=red]

and then use \important{important text} in the text.

2. Colors are not enabled by default in MkII. To enable colors in MkII, use 

\setupcolors[state=start]

3. To disable colors in a document, use 

\setupcolors[state=stop]

Last manual dedicated to color was issued in 2016

Basic Usage

To color text, use 

\color[defined-color]{ ... text ... }

or 

\startcolor[defined-color] 
   ... text ... 
\stopcolor

where defined-color is a color defined using \definecolor. For example, red is one of the predefined colors. So, we can use: 

Three \color[red]{cool} cats

or 

\startcolor[red]
\input tufte
\stopcolor


It is also possible to use RGB or CMYK or hex values to color text. The syntax for these is 

\colored[settings]{... text ...}

where settings are the same settings as used by \definecolor. For example: 


Three \colored[r=0.1, g=0.8, b=0.8]{colorful} cats


Note. There is no need to use the color commands directly. Almost all ConTeXt commands accept a color key, and you can use color=defined-color. For example,

  • To color the section titles red, use
\setuphead[color=red]
  • To color the footnotes red, use
\setupfootnotes[color=red]

etc.

Changing color of entire document

To change the main text color of the document use 

\setupcolors[textcolor=defined-color]

For example, 

\setupcolors[textcolor=blue]
\samplefile{tufte}

Changing background color of page

The background color of the page can be changed using 

\setupbackgrounds[page][background=color,backgroundcolor=defined-color]


For example, 

\setuppapersize[A8, landscape]
\setupbackgrounds[page][background=color,backgroundcolor=blue]
\setupcolors[textcolor=white]

\starttext
\input ward
\stoptext

Defining New Colors

ConTeXt Defining New Colors|supports several color models:

New colors may be defined in the following ways

Name Syntax (and Example) Explanation
RGB color model 
\definecolor[...][r=..., g=..., b=...]

For example, 

\definecolor[lime][r=0.75, g=1, b=0] 
This is \color[lime]{a new color}
that we defined
 The values for r, g, and b are floating point number between 0 and 1.
CMYK color model 
\definecolor[...][c=.., m=.., y=.., k=..]

For example, 

\definecolor[lime][c=0.25, m=0, y=1, k=0] 
This is \color[lime]{a new color}
that we defined
 The values for c, m, y and k are floating point number between 0 and 1.
HSV/HSL color model 
\definecolor[...][h=.., s=.., v=..]

For example, 

\definecolor[lime][h=75, s=1, v=1] 
This is \color[lime]{a new color}
that we defined
 The value for h (hue) is between 0 and 360; the values for s (saturation), v (value/brightness) are floating point numbers between 0 and 1.
HWB color model 
\definecolor[...][h=.., w=.., b=..]

For example, 

\definecolor[something][h=75, w=0.5, b=.1] 
This is \color[something]{a new color}
that we defined
 The value for h (hue) is between 0 and 360; the values for w (whiteness), b (blackness) are floating point numbers between 0 and 1. This mostly unknown color model is also used in CSS3/SVG.
Hex 
\definecolor[...][x=...]

For example, 

\definecolor[lime][x=BFFF00] 
This is \color[lime]{a new color}
that we defined
 The value for x is a three-byte hexadecimal number where the bytes represent the red, green, and blue values. This follows the HTML and CSS style of defining colors.
Gray scale 
\definecolor[...][s=...]

For example, 

\definecolor[screen][s=0.5] 
This is \color[screen]{a new color}
that we defined
 The value for s is a floating point number between 0 and 1, representing the grayness value (1 represents white, 0 represents black).

Cloning existing colors

You can clone an existing color using 

\definecolor[new-color][old-color]

For example 

\usecolors[xwi]
\definecolor[highlight][yellow]
\defineframed
    [important]
    [location=low, frame=off, 
     background=color, backgroundcolor=highlight]

This is an \important{important}word.

\definecolor[highlight][lavenderblush]
This is a \important{important}word.

Adapting existing colors


 TODO: add details about this (See: To-Do List)


Pre-defined colors

The following colors are pre-defined in ConTeXt (see colo-imp-rgb.mkiv).

Name Color Name Color Name Color Name Color
black   white  
gray   lightgray   middlegray   darkgray  
red   lightred   middlered   darkred  
green   lightgreen   middlegreen   darkgreen  
blue   lightblue   middleblue   darkblue  
cyan       middlecyan   darkcyan  
magenta       middlemagenta   darkmagenta  
yellow       middleyellow   darkyellow  

In addition to thees, many color collections are defined, which are not loaded by default. These can be loaded using 

\usecolors[NAME]

where NAME is the name of the collection. The details of colors defined in these collections is shown below. You can also include such a detailed description of the colors defined in a color collection using 

\showcolor[NAME]

For example, the truncated output of \showcolor[crayola] is shown below. 

\showcolor[crayola]


Crayola crayon colors

The following colors are defined in colo-imp-crayola.mkiv. These can be loaded using 

\usecolors[crayola]


Name Color Name Color Name Color Name Color
Red   Maroon   Scarlet   BrickRed  
EnglishVermilion   MadderLake   PermanentGeraniumLake   MaximumRed  
IndianRed   OrangeRed   SunsetOrange   Bittersweet  
DarkVenetianRed   VenetianRed   LightVenetianRed   VividTangerine  
MiddleRed   BurntOrange   RedOrange   Orange  
MacaroniandCheese   MiddleYellowRed   MangoTango   YellowOrange  
MaximumYellowRed   BananaMania   Maize   OrangeYellow  
Goldenrod   Dandelion   Yellow   GreenYellow  
MiddleYellow   OliveGreen   SpringGreen   MaximumYellow  
Canary   LemonYellow   MaximumGreenYellow   MiddleGreenYellow  
Inchworm   LightChromeGreen   YellowGreen   MaximumGreen  
Asparagus   GrannySmithApple   Fern   MiddleGreen  
Green   MediumChromeGreen   ForestGreen   SeaGreen  
Shamrock   MountainMeadow   JungleGreen   CaribbeanGreen  
TropicalRainForest   MiddleBlueGreen   PineGreen   MaximumBlueGreen  
RobinsEggBlue   TealBlue   LightBlue   Aquamarine  
TurquoiseBlue   OuterSpace   SkyBlue   MiddleBlue  
BlueGreen   PacificBlue   Cerulean   MaximumBlue  
BlueI   CeruleanBlue   Cornflower   GreenBlue  
MidnightBlue   NavyBlue   Denim   BlueIII  
CadetBlue   Periwinkle   BlueII   WildBlueYonder  
Indigo   Manatee   CobaltBlue   CelestialBlue  
BlueBell   MaximumBluePurple   VioletBlue   BlueViolet  
UltramarineBlue   MiddleBluePurple   PurpleHeart   RoyalPurple  
VioletII   MediumViolet   Wisteria   LavenderI  
VividViolet   MaximumPurple   PurpleMountainsMajesty   Fuchsia  
PinkFlamingo   VioletI   BrilliantRose   Orchid  
Plum   MediumRose   Thistle   Mulberry  
RedViolet   MiddlePurple   MaximumRedPurple   JazzberryJam  
Eggplant   Magenta   Cerise   WildStrawberry  
LavenderII   CottonCandy   CarnationPink   VioletRed  
Razzmatazz   PigPink   Carmine   Blush  
TickleMePink   Mauvelous   Salmon   MiddleRedPurple  
Mahogany   Melon   PinkSherbert   BurntSienna  
Brown   Sepia   FuzzyWuzzy   Beaver  
Tumbleweed   RawSienna   VanDykeBrown   Tan  
DesertSand   Peach   BurntUmber   Apricot  
Almond   RawUmber   Shadow   RawSiennaI  
Timberwolf   GoldI   GoldII   Silver  
Copper   AntiqueBrass   Black   CharcoalGray  
Gray   BlueGray   White   RadicalRed  
WildWatermelon   OutrageousOrange   AtomicTangerine   NeonCarrot  
Sunglow   LaserLemon   UnmellowYellow   ElectricLime  
ScreaminGreen   MagicMint   BlizzardBlue   ShockingPink  
RazzleDazzleRose   HotMagenta   PurplePizzazz   AztecGold  
BurnishedBrown   CeruleanFrost   CinnamonSatin   CopperPenny  
CosmicCobalt   GlossyGrape   GraniteGray   GreenSheen  
LilacLuster   MistyMoss   MysticMaroon   PearlyPurple  
PewterBlue   PolishedPine   QuickSilver   RoseDust  
RustyRed   ShadowBlue   ShinyShamrock   SteelTeal  
SugarPlum   TwilightLavender   WintergreenDream   Amethyst  
Citrine   Emerald   Jade   Jasper  
LapisLazuli   Malachite   Moonstone   Onyx  
Peridot   PinkPearl   RoseQuartz   Ruby  
Sapphire   SmokeyTopaz   TigersEye   AquaPearl  
BlackCoralPearl   CaribbeanGreenPearl   CulturedPearl   KeyLimePearl  
MandarinPearl   MidnightPearl   MysticPearl   OceanBluePearl  
OceanGreenPearl   OrchidPearl   RosePearl   SalmonPearl  
SunnyPearl   SunsetPearl  

RAL colors

RAL color system (Deutsches Institut für Gütesicherung und Kennzeichnung) approximate RGB colors (inofficial translation from www.ralcolor.com). These are defined in colo-imp-ral.mkiv and can be loaded using 

\usecolors[ral]
Name Color Name Color Name Color Name Color Name Color Name Color
RAL1000   RAL1001   RAL1002   RAL1003   RAL1004   RAL1005  
RAL1006   RAL1007   RAL1011   RAL1012   RAL1013   RAL1014  
RAL1015   RAL1016   RAL1017   RAL1018   RAL1019   RAL1020  
RAL1021   RAL1023   RAL1024   RAL1026   RAL1027   RAL1028  
RAL1032   RAL1033   RAL1034   RAL1035   RAL1036   RAL1037  
RAL2000   RAL2001   RAL2002   RAL2003   RAL2004   RAL2005  
RAL2007   RAL2008   RAL2009   RAL2010   RAL2011   RAL2012  
RAL2013   RAL3000   RAL3001   RAL3002   RAL3003   RAL3004  
RAL3005   RAL3007   RAL3009   RAL3011   RAL3012   RAL3013  
RAL3014   RAL3015   RAL3016   RAL3017   RAL3018   RAL3020  
RAL3022   RAL3024   RAL3026   RAL3027   RAL3028   RAL3031  
RAL3032   RAL3033   RAL4001   RAL4002   RAL4003   RAL4004  
RAL4005   RAL4006   RAL4007   RAL4008   RAL4009   RAL4010  
RAL4011   RAL4012   RAL5000   RAL5001   RAL5002   RAL5003  
RAL5004   RAL5005   RAL5007   RAL5008   RAL5009   RAL5010  
RAL5011   RAL5012   RAL5013   RAL5014   RAL5015   RAL5017  
RAL5018   RAL5019   RAL5020   RAL5021   RAL5022   RAL5023  
RAL5024   RAL5025   RAL5026   RAL6000   RAL6001   RAL6002  
RAL6003   RAL6004   RAL6005   RAL6006   RAL6007   RAL6008  
RAL6009   RAL6010   RAL6011   RAL6012   RAL6013   RAL6014  
RAL6015   RAL6016   RAL6017   RAL6018   RAL6019   RAL6020  
RAL6021   RAL6022   RAL6024   RAL6025   RAL6026   RAL6027  
RAL6028   RAL6029   RAL6032   RAL6033   RAL6034   RAL6035  
RAL6036   RAL6037   RAL6038   RAL7000   RAL7001   RAL7002  
RAL7003   RAL7004   RAL7005   RAL7006   RAL7008   RAL7009  
RAL7010   RAL7011   RAL7012   RAL7013   RAL7015   RAL7016  
RAL7021   RAL7022   RAL7023   RAL7024   RAL7026   RAL7030  
RAL7031   RAL7032   RAL7033   RAL7034   RAL7035   RAL7036  
RAL7037   RAL7038   RAL7039   RAL7040   RAL7042   RAL7043  
RAL7044   RAL7045   RAL7046   RAL7047   RAL7048   RAL8000  
RAL8001   RAL8002   RAL8003   RAL8004   RAL8007   RAL8008  
RAL8011   RAL8012   RAL8014   RAL8015   RAL8016   RAL8017  
RAL8019   RAL8022   RAL8023   RAL8024   RAL8025   RAL8028  
RAL8029   RAL9001   RAL9002   RAL9003   RAL9004   RAL9005  
RAL9006   RAL9007   RAL9010   RAL9011   RAL9016   RAL9017  
RAL9018   RAL9022   RAL9023  

Solarized colors

Colors based on the Solarized color scheme by Ethan Schoonover. These are defined in colo-imp-solarized.mkiv and can be loaded using 

\usecolors[solarized]
Name Color Name Color Name Color Name Color
base03   base02   base01   base00  
base0   base1   base2   base3  
yellow   orange   red   magenta  
violet   blue   cyan   green  

SVG colors

Colors based on the SVG spec. These are defined in colo-imp-svg.mkiv and can be loaded using 

\usecolors[svg]
Name Color Name Color Name Color Name Color
black   navy   darkblue   mediumblue  
blue   darkgreen   green   teal  
darkcyan   deepskyblue   darkturquoise   mediumspringgreen  
lime   springgreen   cyan   aqua  
midnightblue   dodgerblue   lightseagreen   forestgreen  
seagreen   darkslategray   darkslategrey   limegreen  
mediumseagreen   turquoise   royalblue   steelblue  
darkslateblue   mediumturquoise   indigo   darkolivegreen  
cadetblue   cornflowerblue   mediumaquamarine   dimgrey  
dimgray   slateblue   olivedrab   slategrey  
slategray   lightslategray   lightslategrey   mediumslateblue  
lawngreen   chartreuse   aquamarine   maroon  
purple   olive   gray   grey  
skyblue   lightskyblue   blueviolet   darkred  
darkmagenta   saddlebrown   darkseagreen   lightgreen  
mediumpurple   darkviolet   palegreen   darkorchid  
yellowgreen   sienna   brown   darkgray  
darkgrey   lightblue   greenyellow   paleturquoise  
lightsteelblue   powderblue   firebrick   darkgoldenrod  
mediumorchid   rosybrown   darkkhaki   silver  
mediumvioletred   indianred   peru   chocolate  
tan   lightgray   lightgrey   thistle  
orchid   goldenrod   palevioletred   crimson  
gainsboro   plum   burlywood   lightcyan  
lavender   darksalmon   violet   palegoldenrod  
lightcoral   khaki   aliceblue   honeydew  
azure   sandybrown   wheat   beige  
whitesmoke   mintcream   ghostwhite   salmon  
antiquewhite   linen   lightgoldenrodyellow   oldlace  
red   fuchsia   magenta   deeppink  
orangered   tomato   hotpink   coral  
darkorange   lightsalmon   orange   lightpink  
pink   gold   peachpuff   navajowhite  
moccasin   bisque   mistyrose   blanchedalmond  
papayawhip   lavenderblush   seashell   cornsilk  
lemonchiffon   floralwhite   snow   yellow  
lightyellow   ivory   white  


X11 colors

X11_color_names defined in colo-imp-x11.mkiv. These can be loaded using 

\usecolors[x11]


Name Color Name Color Name Color Name Color
snow   ghostwhite   whitesmoke   gainsboro  
floralwhite   oldlace   linen   antiquewhite  
papayawhip   blanchedalmond   bisque   peachpuff  
navajowhite   moccasin   cornsilk   ivory  
lemonchiffon   seashell   honeydew   mintcream  
azure   aliceblue   lavender   lavenderblush  
mistyrose   white   black   darkslategray  
dimgray   slategray   lightslategray   gray  
lightgray   midnightblue   navy   navyblue  
cornflowerblue   darkslateblue   slateblue   mediumslateblue  
lightslateblue   mediumblue   royalblue   blue  
dodgerblue   deepskyblue   skyblue   lightskyblue  
steelblue   lightsteelblue   lightblue   powderblue  
paleturquoise   darkturquoise   mediumturquoise   turquoise  
cyan   lightcyan   cadetblue   mediumaquamarine  
aquamarine   darkolivegreen   darkseagreen   seagreen  
mediumseagreen   lightseagreen   palegreen   lightgreen  
springgreen   lawngreen   green   chartreuse  
mediumspringgreen   greenyellow   limegreen   yellowgreen  
forestgreen   olivedrab   darkkhaki   khaki  
palegoldenrod   lightgoldenrodyellow   lightyellow   yellow  
gold   lightgoldenrod   goldenrod   darkgoldenrod  
rosybrown   indianred   saddlebrown   sienna  
peru   burlywood   beige   wheat  
sandybrown   tan   chocolate   firebrick  
brown   darksalmon   salmon   lightsalmon  
orange   darkorange   coral   lightcoral  
tomato   orangered   red   hotpink  
deeppink   pink   lightpink   palevioletred  
maroon   mediumvioletred   violetred   magenta  
violet   plum   orchid   mediumorchid  
darkorchid   darkviolet   blueviolet   purple  
mediumpurple   thistle   snow1   snow2  
snow3   snow4   seashell1   seashell2  
seashell3   seashell4   antiquewhite1   antiquewhite2  
antiquewhite3   antiquewhite4   bisque1   bisque2  
bisque3   bisque4   peachpuff1   peachpuff2  
peachpuff3   peachpuff4   navajowhite1   navajowhite2  
navajowhite3   navajowhite4   lemonchiffon1   lemonchiffon2  
lemonchiffon3   lemonchiffon4   cornsilk1   cornsilk2  
cornsilk3   cornsilk4   ivory1   ivory2  
ivory3   ivory4   honeydew1   honeydew2  
honeydew3   honeydew4   lavenderblush1   lavenderblush2  
lavenderblush3   lavenderblush4   mistyrose1   mistyrose2  
mistyrose3   mistyrose4   azure1   azure2  
azure3   azure4   slateblue1   slateblue2  
slateblue3   slateblue4   royalblue1   royalblue2  
royalblue3   royalblue4   blue1   blue2  
blue3   blue4   dodgerblue1   dodgerblue2  
dodgerblue3   dodgerblue4   steelblue1   steelblue2  
steelblue3   steelblue4   deepskyblue1   deepskyblue2  
deepskyblue3   deepskyblue4   skyblue1   skyblue2  
skyblue3   skyblue4   lightskyblue1   lightskyblue2  
lightskyblue3   lightskyblue4   slategray1   slategray2  
slategray3   slategray4   lightsteelblue1   lightsteelblue2  
lightsteelblue3   lightsteelblue4   lightblue1   lightblue2  
lightblue3   lightblue4   lightcyan1   lightcyan2  
lightcyan3   lightcyan4   paleturquoise1   paleturquoise2  
paleturquoise3   paleturquoise4   cadetblue1   cadetblue2  
cadetblue3   cadetblue4   turquoise1   turquoise2  
turquoise3   turquoise4   cyan1   cyan2  
cyan3   cyan4   darkslategray1   darkslategray2  
darkslategray3   darkslategray4   aquamarine1   aquamarine2  
aquamarine3   aquamarine4   darkseagreen1   darkseagreen2  
darkseagreen3   darkseagreen4   seagreen1   seagreen2  
seagreen3   seagreen4   palegreen1   palegreen2  
palegreen3   palegreen4   springgreen1   springgreen2  
springgreen3   springgreen4   green1   green2  
green3   green4   chartreuse1   chartreuse2  
chartreuse3   chartreuse4   olivedrab1   olivedrab2  
olivedrab3   olivedrab4   darkolivegreen1   darkolivegreen2  
darkolivegreen3   darkolivegreen4   khaki1   khaki2  
khaki3   khaki4   lightgoldenrod1   lightgoldenrod2  
lightgoldenrod3   lightgoldenrod4   lightyellow1   lightyellow2  
lightyellow3   lightyellow4   yellow1   yellow2  
yellow3   yellow4   gold1   gold2  
gold3   gold4   goldenrod1   goldenrod2  
goldenrod3   goldenrod4   darkgoldenrod1   darkgoldenrod2  
darkgoldenrod3   darkgoldenrod4   rosybrown1   rosybrown2  
rosybrown3   rosybrown4   indianred1   indianred2  
indianred3   indianred4   sienna1   sienna2  
sienna3   sienna4   burlywood1   burlywood2  
burlywood3   burlywood4   wheat1   wheat2  
wheat3   wheat4   tan1   tan2  
tan3   tan4   chocolate1   chocolate2  
chocolate3   chocolate4   firebrick1   firebrick2  
firebrick3   firebrick4   brown1   brown2  
brown3   brown4   salmon1   salmon2  
salmon3   salmon4   lightsalmon1   lightsalmon2  
lightsalmon3   lightsalmon4   orange1   orange2  
orange3   orange4   darkorange1   darkorange2  
darkorange3   darkorange4   coral1   coral2  
coral3   coral4   tomato1   tomato2  
tomato3   tomato4   orangered1   orangered2  
orangered3   orangered4   red1   red2  
red3   red4   debianred   deeppink1  
deeppink2   deeppink3   deeppink4   hotpink1  
hotpink2   hotpink3   hotpink4   pink1  
pink2   pink3   pink4   lightpink1  
lightpink2   lightpink3   lightpink4   palevioletred1  
palevioletred2   palevioletred3   palevioletred4   maroon1  
maroon2   maroon3   maroon4   violetred1  
violetred2   violetred3   violetred4   magenta1  
magenta2   magenta3   magenta4   orchid1  
orchid2   orchid3   orchid4   plum1  
plum2   plum3   plum4   mediumorchid1  
mediumorchid2   mediumorchid3   mediumorchid4   darkorchid1  
darkorchid2   darkorchid3   darkorchid4   purple1  
purple2   purple3   purple4   mediumpurple1  
mediumpurple2   mediumpurple3   mediumpurple4   thistle1  
thistle2   thistle3   thistle4  

The following additional colors are also defined.

Name Color Name Color Name Color
darkgray   darkblue   darkcyan  
darkmagenta   darkred   darkgreen  

XWI Colors

The colors are defined in colo-imp-xwi.mkiv. The name suggests that they were from some color file distributed as part of the X_Window_System. These are a subset of the X11 colors, shown earlier. To load these colors, use: 

\usecolors[xwi]

This loads the following additional colors:

Name Color Name Color Name Color Name Color
aliceblue   antiquewhite   aquamarine   azure  
beige   bisque   black   blanchedalmond  
blue   blueviolet   brown   burlywood  
cadetblue   chartreuse   chocolate   coral  
cornflowerblue   cornsilk   cyan   darkgoldenrod  
darkgreen   darkkhaki   darkolivegreen   darkorange  
darkorchid   darksalmon   darkseagreen   darkslateblue  
darkturquoise   darkviolet   deeppink   deepskyblue  
dodgerblue   firebrick   floralwhite   forestgreen  
gainsboro   ghostwhite   gold   goldenrod  
green   greenyellow   honeydew   hotpink  
indianred   ivory   khaki   lavender  
lavenderblush   lawngreen   lemonchiffon   lightblue  
lightcoral   lightcyan   lightgoldenrod   lightgoldenrodyellow  
lightpink   lightsalmon   lightseagreen   lightskyblue  
lightslateblue   lightsteelblue   lightyellow   limegreen  
linen   magenta   maroon   mediumaquamarine  
mediumblue   mediumorchid   mediumpurple   mediumseagreen  
mediumslateblue   mediumspringgreen   mediumturquoise   mediumvioletred  
midnightblue   mintcream   mistyrose   moccasin  
navajowhite   navy   navyblue   oldlace  
olivedrab   orange   orangered   orchid  
palegoldenrod   palegreen   paleturquoise   palevioletred  
papayawhip   peachpuff   peru   pink  
plum   powderblue   purple   red  
rosybrown   royalblue   saddlebrown   salmon  
sandybrown   seagreen   seashell   sienna  
skyblue   slateblue   snow   springgreen  
steelblue   tan   thistle   tomato  
turquoise   violet   violetred   wheat  
white   whitesmoke   yellow   yellowgreen  

Additional pre-defined colors

In addition to the above, there are other pre-defined colors.

ema \usecolors[ema] colo-imp-ema.mkiv 549 Emacs colors


Advanced Usage

Using colors in MetaPost

A color defined in TeX is available in MetaPost using \MPcolor{...} or in LuaMetaFun simply the name in quotation marks. For example: 

\definecolor[highlight][r=0.8,g=0.8,b=0]
\starttext
\color[highlight]{Highlighted text in TeX}

\startMPcode
label("Highlighted text in MetaPost", origin)
    withcolor \MPcolor{highlight};
\stopMPcode

Note that \MPcolor{...} behaves similar to a color primitive in MetaPost. For example, the following is valid MetaPost code. 

color myColor; myColor = 0.5[\MPcolor{highlight}, white];

For more further reading: Color in MetaPost.

Testing if color is defined

To test if a color is defined, use

Usage: 

\doifcolor{color-name}{... if branch ... }
\doifcolorelse{color-name}{... if branch ...}{... else branch ...}


Viewing pre-defined color

View all defined colors

To view pre-defined colors, you can use \showcolor. For example, to see all the colors defined in colo-imp-x11.mkiv, use (output truncated for display here ...) 

\showcolor[x11]

If you use \showcolor without any argument, all currently defined colors are shown.

View specific defined colors

To view the components of a defined color, you can use: 

\showcolorcomponents[color-1, color-2]

For example, 

\showcolorcomponents[red,middlered,darkred]
 
\colorcompoents{defined-color}
\tranparencycomponents{defined-color}
\processcolorcomponents{defined-color}

For example, 

\startlines
\colorcomponents{red}
\transparencycomponents{red}
\processcolorcomponents{red}
\stoplines

Tips and Tricks

Calculating RGB Values

An example of how to use LMTX to calculate RGB values is the following: 

% Use a color picker to get red, green and blue values of a color:
% Example: RAL 2005: red = 255, green = 35, blue = 1
% Create variables from the values:

\setvariables[ColorName][r=255,g=35,b=1]

% Do some magic:

\usemodule[mathfun]

% Define the actual color based on variables:

\definecolor[ColorName][%
  r={\mathexpr[.3N]{\getvariable{ColorName}{r}/255}},
  g={\mathexpr[.3N]{\getvariable{ColorName}{g}/255}},
  b={\mathexpr[.3N]{\getvariable{ColorName}{b}/255}},
]%

% Test it:

\startTEXpage[offset=5mm]
  \framed[foregroundcolor=white, background=color, backgroundcolor=ColorName]{Hello WORLD!}
  \\\colorcomponents{ColorName}
\stopTEXpage

Further reading and specialized topics

  • Transparency
  • Spot Colors
  • References
    • Paletton - website to choose color palettes
    • ColorBrewer - website to choose colors for maps and graphics
    • Tina Sutton, Bride M Whelan: The Complete Color Harmony. Rockport Publishers (2004). ISBN 978-1592530311 (recommended in the mailing list)
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